TDD1 Switch settings:  O = On  X = Off

Sw1   Sw2   Sw3   Sw4   mode      baud
--------------------------------------
 O     O     O     O    test1     9600
 X     O     O     O             19200
 O     X     O     O    test2    19200
--------------------------------------
 X     X     O     O    FDC mode   150
 O     O     X     O               300
 X     O     X     O               600
 O     X     X     O              1200
 X     X     X     O              2400
 O     O     O     X              4800
 X     O     O     X              9600
 O     X     O     X             19200
 X     X     O     X             38400
 O     O     X     X             76800
--------------------------------------
 X     O     X     X    Brother   4800
 O     X     X     X    mode      9600
 X     X     X     X             19200